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Answer On "older" aircraft, the pilot applies brakes that moves cranks and pulleys that opens the Brake Valve. The Brake Valve ports regulated pressure to the Anti-Skid Manifolds. The Manifolds provides the pressure to the brakes. If the Anti-Skid computer detects a skid condition, the computer commands a pair of matching brakes to release pressure to allow the wheels to spin back up. The anti-skid releases brakes in pairs to keep an equal braking applied to each side of the aircraft. If the braking is unsymmitrical, this could cause the a/c to go into a spin.
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Explain the basics of an aeroplane's Fuel and Hydraulic systems?
Large Commericial Jet ===Fuel Most large commericial jets operate on diesel fuel. The fuel is distributed over several fuel tanks distributed within the wings and the center fuselage. The Fuel Control system is a computer that helps the flight crew distribute the fuel in order to maintain the aircraft center of gravity and attitude for a safe flight. There are fuel probes in each fuel tank and most larger aircraft use more than one probe to determine the exact quantity of fuel in each tank.Each engine will have a fuel controller that provides the correct amount of fuel for the power setting and also adjust controls on the engine to obtain maximum efficiency of burn. For example, the stators on some engine are adjusted to improve the flow through the various turbine stages.Hydraulics - Most of the aircraft mechanical controls are powered by hydraulic pressure. (Aircraft in the future may rely less and less on hydraulics and more on electrical control.) Since the hydraulics are the "blood line" of the aircraft, it is important to ensure that the lines are safe from damage and leaks. Therefore, most aircraft have 2 or 3 redundant hydraulic systems. Usually the flight controls are powered by 2 redundant systems so that the loss of one hydraulic system will not cause that flight control to be inoperative.Each hydraulic system has a Reservoir which collects all returned fluid and filters it. The fluid leaves the reservoir and is routed to the Hydraulic Pumps mounted on the engines. The pump sends the fluid throughout all the lines out to each hydraulic component and then back to the reservoir. Most aircraft operate at 3000 psi pressure. Some military aircraft and commericial aircraft such as the Airbus A380 provides pressure at 5000 psi. The advantage of this is smaller hydraulic lines to save weight.The Hydraulic Components that are powered by the hydraulics are usually simple linear actuators. Some may be rotary actuators or hydraulic latches.The Landing Gears are retracted and extended by hydraulic actuators. The fluid inside the landing gear that allows the strut to absorb the shock of the landing is NOT related to the aircraft hydraulics. The shock strut is a closed system which uses a slightly different type of fluid. The hydraulics does provide power to a Brake Valve that is controlled by the brake pedals in the cockpit. The Brake Valve sends pressure to the Brakesthrough a manifold that is controlled by the anti-skid braking system. Each brake on the aircraft is powered by 2 separate braking systems from two separate hydraulic sources. So, if one hydraulic system fails, then the other hydraulic system can still operate the brakes.The DC10 that crashed in Sioux City, Iowa, had a triple failure of all three of its hydraulic systems. The engine on the tail experienced a catastropic failure and pieces of turbine blades cut hydraulic lines that were routed to the tail of the aircraft. The aircraft lost all hydraulics. It had not control of any flight surfaces. The landing gear can be extended by free-fall. The only controls it had were throttle to the engines.Custermen
What is function of damping relay in circuit breaker?
The anti-pumping relay is a device in circuit-breaker whose function is to prevent multiple breaker closures. For instance, if the operator gives the closing command to the breaker by pressing the close button and the breaker closes. However, a fault in the system causes the breaker to trip. Since the close command is still in the pressed condition, there is a chance of the breaker closing again and being tripped by the relay multiple times. This can damage the closing mechanism of the breaker. The anti-pumping relay prevents this by ensuring that the breaker closes only once for one close command from the control panel.
What is the basic principle of pneumatic control valves?
Compressed air brake systemCompressed air brake systems are typically used on heavy trucks and buses. The system consists of service brakes, parking brakes, a control pedal, an engine-driven air compressor and a compressed air storage tank. For the parking brake, there is a disc or drum brake arrangement which is designed to be held in the 'applied' position by spring pressure. Air pressure must be produced to release these "spring brake" parking brakes. For the service brakes (the ones used while driving for slowing or stopping) to be applied, the brake pedal is pushed, routing the air under pressure (approx 100-125psi) to the brake chamber, causing the brake to reduce wheel rotation speed. Most types of truck air brakes are drum units, though there is an increasing trend towards the use of disc brakes in this application. The air compressor draws filtered air from the atmosphere and forces it into high-pressure reservoirs at around 120 PSI. Most heavy vehicles have a gauge within the driver's view, indicating the availability of air pressure for safe vehicle operation, often including warning tones or lights. Setting of the parking/emergency brake releases the pressurized air pressure in the lines between the compressed air storage tank and the brakes, thus actuating the (spring brake) parking braking hardware. An air pressure failure at any point would apply full spring brake pressure immediately. Design and functionA compressed air brake system is divided into a supply system and a control system. The supply system compresses, stores and supplies high-pressure air to the control system as well as to additional air operated auxiliary truck systems (gearbox shift control, clutch pedal air assistance servo, etc.). Supply system" Over simplified" air brake diagram on a commercial road vehicle (does not show all air reservoirs and all applicable air valves).The air compressor is driven off of the engine either by crankshaft pulley via a belt or directly off of the engine timing gears. It is lubricated and cooled by the engine lubrication and cooling systems. Compressed air is first routed through a cooling coil and into an air dryer which removes moisture and oil impurities and also may include a pressure regulator, safety valve and a smaller purge reservoir. As an alternative to the air dryer, the supply system can be equipped with an anti freeze device and oil separator. The compressed air is then stored in a reservoir (also called a wet tank) from which it is then distributed via a four way protection valve into the front and rear brake circuit air reservoir, a parking brake reservoir and an auxiliary air supply distribution point. The system also includes various check, pressure limiting, drain and safety valves.Control systemThe control system is further divided into two service brake circuits: the parking brake circuit and the trailer brake circuit. This dual brake circuit is further split into front and rear wheel circuits which receive compressed air from their individual reservoirs for added safety in case of an air leak. The service brakes are applied by means of a brake pedal air valve which regulates both circuits. The parking brake is the air operated spring brake type where its applied by spring force in the spring brake cylinder and released by compressed air via hand control valve. The trailer brake consists of a direct two line system: the supply line (marked red) and the separate control or service line (marked blue). The supply line receives air from the prime mover park brake air tank via a park brake relay valve and the control line is regulated via the trailer brake relay valve. The operating signals for the relay are provided by the prime mover brake pedal air valve, trailer service brake hand control (subject to a country's relevant heavy vehicle legislation) and the prime mover park brake hand control.
What is anti-dependence?
Statement S2 is anti-dependent on statement S1 if S2 follows S1 in program order and if the output of S2 overlaps the input of S1. The anti-dependence S1 to S2 define as cross arrow such as S1 |-> S2.
Who invented screw levers?
anti biotics
Who invented antilock brake system?
Anti-lock braking systems were first developed for aircraft use in 1929, by the french automobile and aircraft pioneer, Gabriel Voisin
Why is anti aircraft called triple a?
Actually, it is not really called anti-aircraft. It is Anti-Aircraft Artillery, which is the name of artillery (guns) that are designed to destroy aircraft.
When was Anti-Aircraft Command created?
Anti-Aircraft Command was created in 1939.
What is a AAA gun?
Anti-Aircraft gun
What is a sentence with the word anti-aircraft?
The root word "anti" means against, so this term means anything that repels aircraft. The anti-aircraft guns drove the enemy planes away.
When did Anti-Aircraft - video game - happen?
Anti-Aircraft - video game - happened in 1975.
When was Anti-Aircraft - video game - created?
Anti-Aircraft - video game - was created in 1975.
What did AA stand for?
Anti Air or Anti Aircraft
When was Anti-Aircraft Flak Battle Badge created?
Anti-Aircraft Flak Battle Badge was created on 1941-01-10.
What are the release dates for Anti-Aircraft - 1975 VG?
Anti-Aircraft - 1975 VG was released on: USA: 6 June 1975
What is an anti aircraft fire called?
Acac
How did anti aircraft improve?
they could fly it.
